I'd suggest going into options once you've started a game and changing the difficulty to casual if you are just here for the score
Casual is not available. It is called easy. Can also be done from the main menu.
Head to the small beach to find Aziel by some goblins, go up to him and talk to him
Azielle and not him but her. Gender equality! 
This is repeated throughout. EDIT: in your video, you have a female character but a guy with you. It must be different depending on which gender you start with.
You'll get an achievement after beating the crab
You miss out collecting the egg with
.
Talk to Mariliane and ask about pages
You haven't said where she is. Had to check your video as I could not find this new character.
Follow the rocks left past the seagull nest to find Chugfly sitting on a ledge
Chugflea, not Chugfly. They are two different characters.
Now go into the hole to go below deck and head opposite the way to the door to find a troll and a chest in a corner.
This description did not help. Had to use the video. Maybe an alternative would be to say behind the hatch?
In the hints and tips page, under the controls, I recommend adding that
allows you to fly faster. I did not know you could until I saw your videos.
No longer waiting for sigs to stop deleting.